If I take cash-out refinance (e.g. 80% of equity) for this house so that I can use that money in some other investment, would it result in same (or simlar) tax benefit as like I have a refresh mortage on this house? 

@Nisarg GandhiUnfortunately, you may lose out on the partial exclusion if you rented the house prior to sale.The exclusion is dependent on sale as a result of the move.

You might ask a title company to produce a commitment so you can see what they will require to issue a policy w/o exception for the mtg and then you'll probably need to talk with a knowledgeable PA real estate litigation attorney.

This isn't an investment for you, so if the end result is what you are looking for, then it's worth it.

To do that they'll search the title and produce a commitment telling you what they require to issue a policy w/o an exception for other possible interests. 

While not all resulted in net losses on the project, a few did.

When your bid is recognized as the low bid on the Results Page, you are obligated to pay for the certificate even if the bid was unintentional.Doesn't say what happens if multiple parties bid to 0%, so I assume it's the first party to bid the lowest. 

You may also ask for additional compensation, as not clearing the debt from your books as they were hired to do could be costing you income-producing activities.All of that said, you need legal representation right away.  

that I have tried my self to calculate the Annual Return on investment with my calculator but it gave me wrong results than that the result mentioned by the book  .

Purchase price: $150,000 Cash invested: $50,000 Has a larger multi-garage on the lot, those are all rented out and producing income.